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4(x+1)/(x+1) - x-1/x+1
4x+4-x+1/x+1= 3x+5/x+1
2.
x+2/x-3 * x+3/2x-1= x²+3x+2x+6 / 2x²-x-6x+3 = x²+5x+6/2x²-7x+3
3.x²-5 / x²-4x-3x+12= x²-5/ x²-7x+12
nie wiem czy mialas juz delty itd???
pozdrawiam